Specification for dental porcelains for jacket crowns 套冠用牙瓷料规范
Insulators and fittings for overhead lines . insulators of ceramic material for voltages lower than 1000 v 架空线路用绝缘子和配件.电压低于1000 v的瓷料绝缘子
Insulators and fittings for overhead lines . insulators of ceramic material for voltages lower than 1000 v requirements 架空线路用绝缘子和配件.电压低于1000 v的瓷料绝缘子要求
Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal voltages greater than 1 kv 公称电压大于1 kv的系统用室内和室外瓷料或玻璃支柱绝缘子的试验
Tests on indor and outdoor post insulators of ceramic materiel or glass for systems with nominal voltages greater than 1000 v 公称电压高于1000 v的系统用室内和室外瓷料或玻璃支柱绝缘子的试验